Fix duplicate symbols error in external/vboot_reference am: 00f96d2a69

Original change: https://android-review.googlesource.com/c/platform/external/vboot_reference/+/2658076

Change-Id: I94ee0138bbcfdd0ef7fb05535d71d66a4507dd7f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>